We explain what deposition is in physics, how it occurs and various examples. In addition, deposition in the legal, labor and more fields.

Deposition occurs when a gas passes to the solid state without going through the liquid.

What is the deposition?

It is called deposition, desublimation or reverse sublimation to a thermodynamic process of change of phases of matter in which a gas transforms directly into a solid. Occasionally, deposition can occur with fluids other than gases. Since it is a physical change, the deposition process does not alter the chemical composition of the substance who suffers it.

Deposition is the reverse process of sublimation, in which a solid passes directly to the gaseous state (without going through a liquid phase ). It is also a process exothermic, that is, when it occurs it releases Energy to the environment.

Deposition is a relatively common process both in the nature as in laboratories and in industrial processes such as physical deposition in the steam (PVD). This term also designates the reappearance of a solid that has previously been scattered or diluted in a fluid, as occurs with the everyday dust (solid) that floats in the air (fluid) and that, given enough time, falls until it is deposited in the I usually.

Examples of deposition

The deposition of volcanic ash occurs after a period of suspension in the air.

Examples of reverse deposition or sublimation are:

  • The freezing of air at the poles and the cusp of the moutains, going directly from its gaseous state, to ice or frost.
  • Synthetic diamonds are created through processes of deposition of atoms carbon gases, a complex process carried out in industrial laboratories.
  • The physical vapor phase deposition of different materials, which are first heated to evaporation Or pulverized through the bombardment of ions, and then promote its return to the solid state on a surface that you want to cover with a thin layer of said materials.
  • When we dilute a solid (such as sugar) in a fluid (such as water) and then leave the latter at rest for a sufficient time, part of the solid will return to its initial state at the bottom of the container. This is also known as a bowel movement.
  • The light volcanic ash that is thrown into the atmosphere by a eruption they can remain floating during a time until they slowly settle on the earth's surface.

Other uses of the term deposition

Apart from its meaning in physics, the term deposition has other specific uses:

  • A legal deposition. It is a statement or exposition that is made of something, generally on the part of a third party, addressed to the pertinent authorities.
  • A job deposition. It refers to the demotion or dismissal of the job position of a person.
  • A fecal stool. It is the technical name that they receive in Sciences faeces from the body, that is, the product of evacuation or defecation.
  • An ecclesiastical deposition. It is a perpetual and irremissible punishment that the Church exercises totally or partially on its priests and clergy, taking away their investiture, their functions and their privileges.
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